the boy in the white striped pajamas

I liked how the movie was filmed. The street scenes and Nazi uniforms well matched with the period. I know it because I used to study German culture and language and myself is a war time military things collector. I had done many researches on WW2 period soldiers' uniforms.
The only thing. The music was well composed and used. The German kid, finding the forbidden way out to the concentration camp through the woods was really like a kid's view of exploring the woods.
But it disturbed me very much when I heard the Nazi's saying:

• "Son, they(Jews) are not really people."
• And barking order at the Jewish people. The Nazis treated Jews worse than animals.
• At one stage, looking at the smoke coming out of incinerator chimney and says: "They smell worse when they are dead"